Author: Site Editor Publish Time: 2025-09-02 Origin: Site
In industries such as precision coating, electronic tape, and carbon fiber prepreg, the surface properties of release paper directly affect the coating effect and product quality. This article will explore the close relationship between release paper surface tension and coating uniformity, and provide selection and technical references for coating processing companies in combination with actual application scenarios.
Surface tension is the attraction between molecules on the surface of a liquid. It is a physical quantity that measures the spreadability of a liquid on a solid surface. The commonly used unit is dyne/cm.
Common methods include:
Dyne pen test
Contact angle meter (Goniometer)
Surface energy meter
Professional advice: Before selecting release paper, be sure to confirm whether its surface tension meets the coating process requirements through instrument measurement. If you need professional advice or customized services, you can contact Revolve CF release paper supplier (https://www.revolve-cf.com, email: HarveyXu@revolve-cf.com).
Coating quality is not only related to the appearance of the final product, but also to functional performance, such as adhesion, demolding force, air permeability, etc. The core factors that affect coating uniformity include:
| Influencing factors | Description |
| Substrate surface tension | Too low surface tension will cause the glue to shrink or bead |
| Coating process parameters | Including scraper pressure, speed, temperature, etc. |
| Adhesive viscosity | The higher the viscosity, the more difficult it is to coat evenly |
| Environmental humidity and cleanliness | Dust in the air can also cause coating defects |
"Fisheye" phenomenon: round protrusions or holes appear in the coating
"Shrinkage" phenomenon: the edge of the coating shrinks and exposes the substrate
Striped sagging: the coating does not flow smoothly due to uneven surface energy
Surface tension is too low ➝ The coating cannot be spread well ➝ Shrinkage and faults appear
Surface tension is moderate or matches the polarity of the coating ➝ Spread evenly ➝ Stable coating
Surface tension is too high ➝ Over-spreading ➝ Edge overflow, difficult to control shape
| Release Paper Type | Surface Treatment Method | Recommended Surface Tension (dyne/cm) | Applicable Scenarios |
| PET release film | Silicone oil treatment/plasma treatment | 42-58 | Carbon fiber prepreg, electronic tape |
| Glasine | Double-sided silicone coating | 38-45 | Hot melt adhesive, label, tape, etc. |
| Kraft paper release paper | Single-sided silicone/double-sided silicone | 32-40 | Building sealant, industrial tape |
As a professional release paper supplier, Revolve CF can provide a variety of high-performance release materials required for different coating needs. Welcome to email for samples and quotations: HarveyXu@revolve-cf.com
High surface tension can reach 56 dyne/cm
Good thermal stability, can withstand high temperature baking above 150°C
High surface flatness, suitable for high-precision coating requirements
Easy to peel, not easy to powder, wide adaptability
| Coating type | Recommended surface tension range | Reasoning |
| Water-based adhesive | 40-45 dyne/cm | High wettability, moderate tension to prevent over-spreading |
| Oil-based adhesive | 36-42 dyne/cm | High viscosity, slightly lower surface tension required to avoid edge shrinkage |
| UV coating | 48-56 dyne/cm | High adhesion required, high tension material required |
Use plasma treatment or corona treatment to increase substrate surface energy
Control drying temperature and speed to avoid secondary flow of colloid
Regularly test release paper surface tension to ensure consistency
High-quality release paper suppliers can provide:
Surface tension customization range control
Long-term consistency batch delivery guarantee
Professional pre-sales and after-sales technical support
Revolve CF release paper suppliers focus on high-performance release materials and provide reliable supporting products for carbon fiber materials, tapes, electronic materials, etc. For technical information or customized services, please visit: https://www.revolve-cf.com, or send an email to: HarveyXu@revolve-cf.com
The surface tension of release paper not only determines its coating suitability, but also directly affects the uniformity and final quality of the coated product. When selecting release materials, companies should combine the type of coating used, equipment parameters and terminal application requirements, scientifically select, and customize with experienced suppliers. By optimizing surface tension and improving coating uniformity, it will provide a solid guarantee for product quality.
If you need to purchase, customize or learn more about release paper solutions, please contact professional release paper supplier Revolve CF.
Contact email: HarveyXu@revolve-cf.com
Official website: https://www.revolve-cf.com
